I didn't get any responses. This really makes me question the demand for tuners.

I think all it questions is whether or not people would be willing to pay $250.00 for a tuner, which is what someone might have thought you were asking from a quick skim of the message.

If one reads the message closely, of course, it's plain that you don't actually say you want $250.00 for it. But I know that I certainly stopped reading the message after the first line. I only gave it closer inspection after this follow-up post.